import React, { Component } from 'react'
import { withRouter } from 'react-router-dom'

 class Header extends Component {
    back=()=>{
        this.props.history.goBack()
    }
    forward=()=>{
        this.props.history.goForward()
    }
  render() {
    return (
        <div className="row">
            <div className="col-xs-offset-2 col-xs-8">
                <div className="page-header"><h2>React Router Demo</h2></div>
            </div>
            <button onClick={this.back}>回退</button>
            <button onClick={this.forward}>前进</button>
        </div>
    )
  }
}
export default withRouter(Header)
